Sine-Gordon equation (source code)

= Sine-Gordon equation
{c}
{title2=$u_{XT}=\sin u$}
{wiki}

In light-cone coordinates, the sine-Gordon equation can be written $u_{XT}=\sin u$. Its <inverse scattering transform>, <solitons>, breathers, and scaling symmetries make it an <integrable systems>[integrable system].